NCP1379
http://onsemi.com
4
MAXIMUM RATINGS TABLE(S)
Symbol Rating Value Unit
V
CC(MAX)
I
CC(MAX)
Maximum Power Supply voltage, VCC pin, continuous voltage
Maximum current for VCC pin
−0.3 to 28
$30
V
mA
V
DRV(MAX)
I
DRV(MAX)
Maximum driver pin voltage, DRV pin, continuous voltage
Maximum current for DRV pin
−0.3 to 20
$1000
V
mA
V
MAX
I
MAX
Maximum voltage on low power pins (except pins DRV and V
CC
)
Current range for low power pins (except pins ZCD, DRV and V
CC
)
−0.3 to 10
$10
V
mA
I
ZCD(MAX)
Maximum current for ZCD pin +3 / −2 mA
R
q
JA
Thermal Resistance Junction−to−Air 120 °C/W
T
J(MAX)
Maximum Junction Temperature 150 °C
Operating Temperature Range −40 to +125 °C
Storage Temperature Range −60 to +150 °C
ESD Capability, Human Body Model (HBM) model (Note 1) 4 kV
ESD Capability, CDM model (Note 1) 2 kV
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests: Human Body Model 4000 V per JEDEC Standard JESD22,
Method A114E. Charged Device Model 2000 V per JEDEC Standard JESD22−C101D
2. This device contains latchup protection and exceeds 100 mA per JEDEC Standard JESD78.
ELECTRICAL CHARACTERISTICS (Unless otherwise noted: For typical values T
J
= 25°C, V
CC
= 12 V, V
ZCD
= 0 V, V
FB
= 3 V,
V
CS
= 0 V, V
fault
= 1.5 V, C
T
= 680 pF) For min/max values T
J
= −40°C to +125°C, Max T
J
= 150°C, V
CC
= 12 V)
Symbol
Parameter Conditions Min Typ Max Unit
SUPPLY SECTION − STARTUP AND SUPPLY CIRCUITS
V
CC(on)
V
CC(off)
V
CC(hyst)
V
CC(reset)
Supply Voltage
Startup Threshold
Minimum Operating Voltage
Hysteresis V
CC(on)
− V
CC(off)
Internal logic reset
V
CC
increasing
V
CC
decreasing
V
CC
decreasing
10.5
8.3
2.0
6
11.4
9.0
2.4
7
12.3
9.4
−
8
V
t
VCC(off)
V
CC(off)
noise filter − 5 −
ms
t
VCC(reset)
V
CC(reset)
noise filter − 20 −
ms
I
CC(start)
Startup current FB pin open
V
CC
= V
CC(on)
− 0.5 V
− 0.7 1.2 mA
I
CC1
I
CC2
I
CC3A
I
CC3B
Supply Current
Device Disabled/Fault (Note 3)
Device Enabled/No output load on pin 5
Device Switching (F
sw
= 65 kHz)
Device Switching (F
sw
around 12 kHz)
V
CC
> V
CC(off)
F
sw
= 10 kHz
C
DRV
= 1 nF, F
sw
= 65 kHz
C
DRV
= 1 nF, V
FB
= 1.25 V
−
−
−
−
1.7
1.7
2.65
2.0
2.0
2.0
3.00
−
mA
CURRENT COMPARATOR − CURRENT SENSE
V
ILIM
Current Sense Voltage Threshold V
FB
= 4 V, V
CS
increasing 0.76 0.80 0.84 V
t
LEB
Leading Edge Blanking Duration for V
ILIM
Minimum on time minus
t
ILIM
210 275 330 ns
I
bias
Input Bias Current (Note 3) DRV high −2 − 2
mA
t
ILIM
Propagation Delay V
CS
> V
ILIM
to DRV
turn−off
− 125 175 ns
I
peak(VCO)
Percentage of maximum peak current level at which
VCO takes over (Note 4)
V
FB
= 0.4 V, V
CS
increasing
15.4 17.5 19.6 %
3. Guaranteed by design
4. The peak current setpoint goes down as the load decreases. It is frozen below I
peak(VCO)
(I
peak
= cst)
5. If negative voltage in excess to −300 mV is applied to ZCD pin, the current setpoint decrease is no longer guaranteed to be linear
6. Minimum value for T
J
= 125°C
